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The Great Wall in China (Photo: Internet)

With the fast expansion of tourism, China has become the world's largest source of outbound tourists and the fourth largest destination of inbound tourists.

China National Tourism Administration said 127 million domestic tourists took outbound trips in 2017.

Domestic tourism revenue was 4.57 trillion yuan, up by more than 101.1 percent from 2012, with 5 billion domestic and inbound tourist trips in 2017.

The total number of inbound travellers was 1.39 trillion, including 29.1 billion foreigners, up 7 percent from 2012.

The number of Chinese outbound trips rose to 45.8 billion from 2012, or a total of 1.29 trillion.